Does anyone know what the grade level is that public schools are required to teach up to for children with disabilities? For instance, children with disabilities can attend school until age 21 or they can drop out of school if they so desire regardless of grade level. For instance, intellectually challenged people could stay in school until age 21 but never reach the educational level of the 6th grade because it's not possible for them to go beyond the 6th grade. Is the 6th grade the cutoff for teaching children with exceptionalities?